Google Books Ngram Viewer

Graph these comma-separated phrases:
case-insensitive
between and from the corpus with smoothing of .  
Search in Google Books:

1800 - 1930 1931 - 1988 1989 - 1992 1993 - 1997 1998 - 2000 throttle up English
1800 - 1937 1938 - 1941 1942 - 1943 1944 - 1995 1996 - 2000 throttle back English
1800 - 1915 1916 - 1940 1941 - 1943 1944 - 1979 1980 - 2000 throttle down English

Run your own experiment! Raw data is available for download here.
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